How to clean the throttle?

The method of cleaning the throttle valve is: 1, turn off the ignition switch and remove the negative electrode of the battery; 2. Dismantle the throttle pipe, air inlet hose and the screw for fixing the throttle valve in turn; 3. Clean the throttle with cleaning agent, and wipe the parts that cannot be cleaned with cotton thread. Throttle is a controllable valve that controls air to enter the engine. After the air enters the intake pipe, it will be mixed with gasoline to form a combustible mixture, which will be successfully formed after combustion. The performance of the throttle fault is: 1, the engine can't start or idle, the work is unstable, and the speed is unstable; 2. The engine speed is unchanged and cannot be controlled, and the fault indicator light is on; 3. The acceleration of the car is obviously slow; 4. The exhaust pipe makes abnormal noise.